CN102349004A

CN102349004A - Light source comprising a diode laser and a plurality of optical fibers

Info

Publication number: CN102349004A
Application number: CN2010800112204A
Authority: CN
Inventors: K.施托佩尔; W.赫尔登; H-J.施瓦茨; A.莱奇
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2009-03-11
Filing date: 2010-02-12
Publication date: 2012-02-08
Anticipated expiration: 2030-02-12
Also published as: JP5538441B2; US8761222B2; US20120044966A1; EP2406671A1; CN102349004B; WO2010102880A1; JP2012520476A; DE102009001468A1; EP2406671B1

Abstract

Disclosed is a light source, especially for optically exciting a laser device (11), e.g. a laser device (11) of a laser ignition system in an internal combustion engine (109), comprising a plurality of emitters (131) and a light guiding device (12) that includes a plurality of optical fibers (121), each of which has a first end (1211) and a lateral surface (1217). The first ends (1211) are arranged in such a way relative to the emitters (131) that light emitted by the emitters (131) is injected into the first ends (1211) of the optical fibers (121). The optical fibers are arranged edge to edge along the lateral surfaces (1217) thereof, at least in the area of the first ends (1211) of the optical fibers. The disclosed light source is characterized in that the optical fibers (121) are connected to a fiber support (20) in the area of the first ends (1211) of the optical fibers.

Description

Light source with diode laser and a plurality of optical fiber

Technical field

The present invention relates to a kind of light source and a kind of method that is used to make light source of the preamble according to independent claims.

Background technology

Such light source is known from DE 10 2,004 006 932 B3; And has diode laser bar (Diodenlaserbarren); This diode laser bar has a plurality of long and narrow emitters, these emitters arranged in series abreast on its long axis direction.Be assigned the device that is used for the laser beam of sending from it is carried out beam guiding and beam shaping to diode laser bar, this device contains the light transmitting fiber of a plurality of arranged in series abreast, and laser beam is transfused to and is coupled in the said light transmitting fiber.Defined be that light transmitting fiber does not make up bunchy on relative side, wherein irradiated, be located at the light transmitting fiber that is spaced apart from each other in the diode laser bar between the emitter of arranging by from this intrafascicular eliminating.

Be that the device that is used for beam guiding and beam shaping is little in the mechanically stable property in the zone of the input coupling of carrying out laser beam, and has therefore hindered the operation to the device that is used for beam guiding and beam shaping from the shortcoming of light source commonly known in the art.In addition, the operability of this device reduces.First aspect of the present invention and task of the present invention are to overcome this shortcoming.

Also have from the shortcoming of light source commonly known in the art, also contain such optical fiber intrafascicular: in said optical fiber, only import the less light of coupling ratio.In this way, reduced the density of radiation of the output of the device that is used for firing rate guiding and firing rate shaping, and firing rate guides and the availability of the optical pumping that for example is used for solid state laser of the light that the device of firing rate shaping sends reduces from being used for.Second aspect of the present invention is to overcome this shortcoming.

The third aspect of the invention is, a kind of light source is described, wherein the high share of the emission of diode laser is transfused to be coupled in the light guide and in this light guide and is transmitted.

Other aspect of the present invention relates to the method for the light source that is used to be manufactured on this open type.

Knownly from DE 10 2,004 006 932 B3 make light source through following mode: the circular light guide fiber is arranged with terminal fragment abreast and their stub area is placed in the mould; In this mold; These light transmitting fibers become the square-section through pressure sintering, and the optical fiber that wherein is arranged side by side melts together in the zone endways each other.

From manufacturing approach commonly known in the art, only make a unique device that is used for firing rate guiding and firing rate shaping respectively by every workflow that layout and hot pressing to optical fiber constitute.In addition, light transmitting fiber endways the layout in the fragment be more time-consuming.Therefore, the shortcoming that has from method commonly known in the art is low economy.First other aspect of the present invention is a kind of method to be described, at least two light guides of wherein every workflow manufacturing.

Significant when especially carrying out said method with industrial scale is in fact with the desired shaping of carrying out optical fiber of measuring, but on the other hand, to get rid of the excessive compression to optical fiber reliably.Therefore, second other aspect of the present invention is, assurance is carried out defined shaping with pinpoint accuracy to optical fiber method is described.

Summary of the invention

Advantage according to light source of the present invention had is that the mechanically stable property in first stub area of optical fiber is high, makes that light guide can no problem ground be high operability by operation and characteristics.

According to the present invention; This is able to solve under situation of the light source of---for example the laser aid of the Laser Ignition System of internal combustion engine---in particular for exciting laser device optically a kind of; This light source comprises diode laser and the light guide with a plurality of emitters; Wherein light guide comprises that a plurality of optical fiber and each optical fiber all have first end and side; Wherein first end of optical fiber is arranged such that with respect to emitter the light that is generated by emitter is transfused in first end that is coupled to optical fiber; Wherein optical fiber is arranged along its side opposite side in the zone of its first end at least (auf Sto), and the mode that realizes this point is that optical fiber is connected with optic fibre carrier in the zone of its first end.

At this, should first end of optical fiber be understood as the end of optical fiber on its long axis direction, for example under the situation of cylindrical fiber, be understood as cylindrical basal plane.At this, should the side of optical fiber be understood as the face that optical fiber is limited perpendicular to its major axis, for example under the situation of cylindrical fiber, be understood as cylindrical side.Should the optical fiber of the border district being arranged along its side be understood as following optical fiber: all optical fiber in these optical fiber or nearly all optical fiber, for example more than the optical fiber of 90% optical fiber along its contacts side surfaces direct neighbor.

Under the situation of light source with light guide; Wherein light guide comprises a plurality of optical fiber; Wherein optical fiber is connected with optic fibre carrier in its first terminal zone, should this light source be understood as the zone of first end in the whole zone that is connected with optic fibre carrier of optical fiber.

Advantageously; When optic fibre carrier is connected with the side of optical fiber in first of the optical fiber terminal zone and/or when optic fibre carrier on the length of fiber direction with optical fiber termination and/or during evenly when bonding firm connection of causing forming between optical fiber and the optic fibre carrier, draw the extra high mechanical robustness of light guide.

Advantageously, when light guide also has second optic fibre carrier except said optic fibre carrier, draw the extra high mechanical robustness of light guide, wherein fiber arrangement is between these optic fibre carriers.In this case; When exist between second optic fibre carrier and the optical fiber be connected, during especially bonding firm connection and/or when second optic fibre carrier on the length of fiber direction with optical fiber and/or with optic fibre carrier evenly during termination, the mechanical robustness of light guide also improves.

Through being optical fiber and being the suitable material of optic fibre carrier selection that the advantage that can realize is to make especially simply according to device of the present invention.

Advantageously, optical fiber is processed by one or more first glass, and optic fibre carrier processed by one or more second glass, and the softening temperature of one or more second glass has the value higher than the softening temperature of one or more first glass.Possible in this case is that selectivity is carried out the distortion of optical fiber, can avoid the distortion of optic fibre carrier simultaneously basically.

Advantageously; Optical fiber is processed by one or more first glass; And one or more optic fibre carriers are processed by one or more second glass, and one or more first glass of one or more second glass hardness ratio at room temperature hardness at room temperature has higher value.Possible in this case is, carries out the final processing of light guide, for example polishing, wherein gets rid of the cut of the end face of optical fiber through the one/a plurality of optic fibre carriers that rub.

Advantageously; Optical fiber is processed by one or more first glass; And one or more optic fibre carriers are processed by one or more second glass, and the thermal expansivity of one or more second glass has the thermal expansivity value about equally with one or more first glass.In this case, under the situation of temperature change, also can get rid of tension force and the appearance in crack in the light guide reliably.

Advantageously; Optical fiber has the shape of flattening at least in its first terminal zone (wherein optical fiber contacts with each other) and/or in it contacts the zone of one or more optic fibre carriers; This means that the section ratio of optical fiber in these zones has higher radius-of-curvature in it neither contacts with each other the zone that does not also contact one or more optic fibre carriers.Through flattening, enlarged the surface of contact between optical fiber and the one or more optic fibre carrier, make to produce the firm connection between these parts.In addition, the space before the emitter of diode laser is filled by optical fiber better, makes to be improved to the input coupling in the light guide.In a particularly advantageous embodiment, optical fiber along its end face and/or in its first terminal zone by degree like this with or flattening so in large area, make it have rectangle or trapezoidal cross section.

Because the round section of optical fiber realizes the low-loss photoconduction in the optical fiber; But this is more disadvantageous to input coupling, therefore in a favourable expansion scheme of the present invention, stipulates: optical fiber in its first terminal zone the cross section on from first end of optical fiber to second of the optical fiber terminal direction from the round-shaped shape that differs widely, for example rectangle or shape transition trapezoidal or approximate rectangular at least or approximate trapezoid at least shape to circle or sub-circular.

In order to improve mechanical stability and to reduce optical loss, advantageously, said transition is carried out continuously, especially on the whole zone of fiber arrangement at one or more optic fibre carriers, carries out continuously.

When the shape in optical fiber cross section under the situation that is arranged in the zone on one or more optic fibre carriers from the regional transition to optical fiber of fiber arrangement on one or more optic fibre carriers be not great-jump-forward ground change but constant basically, when especially remaining circle, also improve the mechanical stability of optical fiber.

According to the present invention; Through a plurality of fiber arrangement being made the optical fiber of especially said type on optic fibre carrier, the optical fiber of said layout is especially bonding firm being connected of formation between heating and the optical fiber that then causes heating and the one or more optic fibre carriers in its first terminal zone.

At this, when the layout of optical fiber carry out make its at least in its first terminal zone along its side when edge-to-edge ground is arranged each other, this method especially can be carried out with reproducing.

Advantageously, when when in the optical fiber heating, causing optical fiber softening and/or when fiber arrangement is between optic fibre carrier and opposite face, cause this connection post, the power that wherein acts on optical fiber acts on optical fiber by means of opposite face.In this case, the heat conduction that produce to improve and produce the exceptionally close contact between each surface.

Consider second aspect of the present invention; Wherein propose: under a kind of situation in particular for the light source of the laser aid of the Laser Ignition System of exciting laser device, for example internal combustion engine optically; Wherein this light source comprises diode laser and the light guide with a plurality of emitters; Wherein light guide comprises that a plurality of optical fiber and each optical fiber all have first end and side; Wherein first end is arranged such that with respect to emitter the light that is generated by emitter is transfused in first end that is coupled to optical fiber; Wherein optical fiber is arranged the border district along its side in the zone of its first end at least; And wherein the first of optical fiber forms bundle in the zone of its second end, and wherein the first of optical fiber is made up of following optical fiber: will all import the part input of being coupled to the light the optical fiber from emitter respectively and be coupled in the said optical fiber, wherein this part is higher than and is not equal to 0 first ultimate value.

This aspect of the present invention based on thought be that the optical fiber of input coupling little light only is received into reducing of the intrafascicular density of radiation that causes being provided by light source.But should be noted that simultaneously through optical fiber and will cause reducing by the radiation power that light source provides from intrafascicular eliminating input coupling light.In addition; The present invention based on understanding be, according to the geometrical property of the special characteristics of diode laser and optical fiber, especially diode laser and optical fiber, and according to the application of light source, for example be used for the application of the pumping of solid state laser; More need the optimization of radiation power; More need the optimization of density of radiation, and in addition the present invention based on understanding be to consider following content: confirm to be not equal to 0 first ultimate value; And just in time when being coupled to the part input greater than the emission of first ultimate value of diode laser in the optical fiber, these optical fiber are received into this is intrafascicular.Under the background of these thoughts and understanding, the professional is through simple research, for example find first ultimate value through implement measuring sequence.

First ultimate value for example can be inverse and given factor in advance long-pending of the number of fibers of light guide, wherein this factor more than or equal to 0.03, especially be in 0.07 to 0.2 between and for example be 0.1.

Additionally or alternately; First ultimate value can be long-pending with given in advance factor of the merchant of the highest input total radiant power that is coupled to radiation power and diode laser in the optical fiber, wherein this factor more than or equal to 0.03, especially be in 0.07 to 0.5 between and for example be 0.2.

But advantageously also possible is, a kind of light source is provided, and this light source provides the density of radiation of optimization and the radiation power of optimization is provided simultaneously.Regulation for this reason: at least a portion of those optical fiber that does not belong to the first of optical fiber belongs to the second portion of optical fiber, and the second portion of optical fiber is arranged around bundle in second of the optical fiber terminal zone.

For example possible is that the second portion of optical fiber comprises those optical fiber that do not belong to first.

Advantageously, belong to optical fiber second portion only be following optical fiber: in said optical fiber, import the part of the emission of coupling diode laser instrument respectively, wherein this part is higher than and is not equal to 0 second ultimate value.

Certainly take out the other part of optical fiber similarly and it is made up in second of the optical fiber terminal zone.Possible in addition is, through targetedly in certain limit with fiber arrangement its second terminal in the beam in cross section of emission in free selective light source.

Therefore; For example possible is; Optical fiber is made up bunchy in its second terminal zone, wherein the major part of the emission of diode laser is transfused to the optical fiber that is coupled to and the smaller portions of the emission of diode laser and is transfused to the optical fiber that is coupled to and compares and be arranged in intrafascicular by heart in more.Advantageously, can generate similarly launching of light source in this way with so-called Gauss's radiation.

Light source, in particular for the light source of the laser aid of the Laser Ignition System of exciting laser device, for example internal combustion engine optically, especially can make through a kind of mode at the light source of this disclosed type; Wherein stipulated a plurality of fiber arrangement before a plurality of emitters of diode laser; Wherein optical fiber is arranged to the edge-to-edge along its side in the zone of its first end at least each other; Wherein the emission of emitter is transfused in first end that is coupled to optical fiber; Wherein this method is also stipulated: detect input and be coupled to the radiation power in the optical fiber; And regulation: the first of optical fiber is formed bundle in the zone of its second end; Wherein the first of optical fiber comprises following optical fiber: input coupling is all by the part of the light of emitter generation respectively in said optical fiber, and wherein this part is higher than and is not equal to 0 first ultimate value.

Possible in principle is to select optical fiber based on first end of optical fiber with respect to the layout of the emitter of diode laser.But significantly more effectively with thus more advantageously, based on from the measurement of the radiation power of the second terminal outgoing of optical fiber or be based on the side direction from the measurement of the scattered radiation of optical fiber outgoing and select optical fiber.

Another efficient of this method improves and advantageously realizes through following mode: for example utilize ccd video camera to carry out a plurality of, the especially measurement of the radiation power of all optical fiber simultaneously, the other efficient of this method improves and can realize through following mode: robotization ground and according to the result who measures carry out optical fiber continuation processing, especially optical fiber cuts apart.

Possible in addition is, in second of the optical fiber terminal zone under the effect of heat and power on the side direction, promptly with the direction of the axis of optical fiber on make this bundle change intensive.

Preferably, the first of optical fiber comprises following optical fiber: timesharing ground outgoing has greater than 10kW/cm at least in second end of said optical fiber ²The radiation of peak power density.

Consider the third aspect of the invention; Wherein propose: under a kind of situation in particular for the light source of the laser aid of the Laser Ignition System of exciting laser device, for example internal combustion engine optically; Wherein this light source comprises diode laser and the light guide with a plurality of emitters; Wherein light guide comprises that a plurality of optical fiber and each optical fiber all have first end and side; Wherein light first end is arranged such that with respect to emitter the light that is generated by emitter is transfused in first end that is coupled to optical fiber; Wherein optical fiber arranges to the border district that along its side optical fiber also comprises fibre core and optical fiber cover at least in its first terminal zone, and wherein in the zone of first end, to compare with the cross section of fibre core at least be little in the cross section of optical fiber cover.

Can be especially incident therewith, the thickness of optical fiber cover is in a ratio of little with the cross section of fibre core in the first terminal zone at least.

Through in the first terminal zone, comparing the little cross section of optical fiber cover and/or little thickness with the cross section of fibre core, the high part that has realized the emission of diode laser is transfused to and is coupled in the fibre core and low-loss ground guiding there.The emission of diode laser possibly fall on the end face of optical fiber in the zone of optical fiber cover and there can not or only can be with high loss guiding that part of thus by remarkable reduction.

Especially regulation: optical fiber is enclosed within on the direction with the axis of optical fiber at least basically, for example surround fibre core along at least 99.5% of the outside surface of fibre core.

Especially when the cross section of optical fiber cover in the first terminal zone, be not more than at least fibre core the cross section 30%, especially be not more than fibre core the cross section 10%, or not even greater than the cross section of fibre core 5% the time; Starting point can be the optical fiber with fibre core and optical fiber cover, and wherein the cross section of optical fiber cover is in a ratio of little with the cross section of fibre core in the first terminal zone at least.

Especially when the thickness of optical fiber cover in the first terminal zone, be not more than at least fibre core the cross section subduplicate 7%, especially be not more than cross section subduplicate 3% time of fibre core; Starting point can be the optical fiber with fibre core and optical fiber cover, and wherein the thickness of optical fiber cover is in a ratio of little with the cross section of fibre core in the first terminal zone at least.

Advantageously; When the cross section of fibre core at least in the first terminal zone greater than the cross section of optical fiber 70%, especially greater than the cross section of optical fiber 90%, or even greater than the cross section of optical fiber 95% the time, the high part of the emission of diode laser is transfused to be coupled in the light guide and in light guide and is transmitted.

Advantageously; When the thickness of optical fiber cover is not less than numerical aperture long-pending of the light wavelength that generated by diode laser and optical fiber at least in the first terminal zone; The high part of the emission of diode laser is transfused to be coupled in the light guide and in light guide and is transmitted; Because can avoid the effect of frustrated total reflection in this way, this effect was overlapped under the thin situation at optical fiber and was caused the optical loss in the optical fiber.

Advantageously; When optical fiber has at least 0.4 numerical aperture or has following numerical aperture when---this numerical aperture is at least corresponding to sine of half angle of divergence of the emission of emitter in fast axle---, the high part of the emission of diode laser is transfused to and is coupled in the light guide.

Advantageously; Transmission space when first end of optical fiber has polishing body and/or anti-reflecting layer and/or between emitter and optical fiber fully by the uniform medium of optics, when for example optical gel is full of; Especially when its refractive index is selected suitably, the high part that draws the emission of low optical losses and diode laser when input is coupled in the optical fiber is transfused to and is coupled in the light guide.For this reason, the refractive index of the uniform medium of optics, for example optical gel should equal or be substantially equal to, for example differ the refractive index that is no more than optical fiber 15% or even differ the refractive index that is no more than optical fiber 3%, especially differ the refractive index that is no more than fibre core 15%, especially differ 3% of the refractive index that is no more than fibre core.In addition preferably, the refractive index of the uniform medium of optics, for example optical gel be not more than the refractive index of optical fiber, especially be not more than fibre core refractive index but little up to 15%, especially little of 3%.

Especially can stipulate optical fiber all or almost all first end, for example light guide optical fiber polishing body or anti-reflecting layer be equipped with at least 95% together.

Advantageously, when first end of optical fiber is arranged to and emitter relatively and when having several microns spacing, the high part of the emission of diode laser is transfused to and is coupled in the light guide.

Alternative or additionally; Consider the third aspect of the invention; Wherein propose: under a kind of situation in particular for the light source of the laser aid of the Laser Ignition System of exciting laser device, for example internal combustion engine optically; Wherein this light source comprises diode laser and the light guide with a plurality of emitters, and wherein light guide comprises that a plurality of optical fiber and each optical fiber all have first end and side, and wherein first end is arranged such that with respect to emitter the light that is generated by emitter is transfused in first end that is coupled to optical fiber; Wherein optical fiber is arranged the border district along its side in the zone of its first end at least; Optical fiber has fibre core, optical fiber cover and optical fiber flush coat (Faserschlichte) respectively, and wherein fibre core is processed by first material, and the optical fiber cover is processed by second material; The optical fiber flush coat is processed by the 3rd material, and wherein first material has refractive index n to the light that is generated by diode laser ₁, wherein second material has refractive index n to the light that is generated by diode laser ₂, and wherein the 3rd material has refractive index n to the light that is generated by diode laser ₃, and n is wherein arranged ₁>n ₂>n ₃>1 sets up.

Through selective refraction rate n ₁, n ₂And n ₃Realized; First end at optical fiber of the emission of diode laser is transfused to the part that is coupled in the fibre core and in fibre core, is directed through optical fiber; And reach second end of optical fiber; And simultaneously; The part that is coupled in the optical fiber cover that is transfused to of the emission of diode laser is directed in light transmitting fiber at least in part, and arrives the end that falls into of optical fiber, and wherein being transfused in the optical fiber is coupled to the total reflection of the light of that part of emission in the optical fiber cover based on the interface place between optical fiber cover and the optical fiber flush coat.

Especially regulation in addition: by on the direction of being configured in of constituting of optical fiber and optical fiber cover and the axis of optical fiber at least basically, for example surrounded by the fibre core flush coat along at least 99.5% of the outside surface of the structure of fibre core.

Especially regulation in addition: the optical fiber flush coat with the direction of the axis of optical fiber on form the outer envelope of optical fiber.

Advantageously; When the optical fiber flush coat have be in less than 1 micron, especially during the thickness of 0.02-0.1 micrometer range; The high share of the emission of diode laser is transfused to be coupled in the light guide and in this light guide and is transmitted; Because in this case, to be coupled to the part of the light in the optical fiber flush coat especially little in input.

Advantageously, when alternative or additionally, the refractive index n of optical fiber flush coat ₃Refractive index n than the optical fiber cover ₂Little 1%-15% and/or be at least 1.3 o'clock, the high share of the emission of diode laser is transfused to be coupled in the light guide and in this light guide and is transmitted.

Advantageously; When the optical fiber cover has 1 micron thickness to thickness, especially the 1-5 micrometer range of several micrometer ranges; The high share of the emission of diode laser is transfused to be coupled in the light guide and in this light guide and is transmitted; Because in this case, the part that the light in the optical fiber cover is coupled in input is especially little, but the effect of how to wash the frustrated total reflection at the interface place between optical fiber cover and the fibre core simultaneously still can be got rid of reliably.

For example can realize: the decay that the light in the optical fiber cover is coupled in input is not higher than the roughly twice to three times that the decay of the light in the fibre core is coupled in input.

For example can stipulate: first material and/or second material are glass.For the 3rd material, also can use lacquer or plastics.

For example can stipulate: optical fiber at least in its first terminal zone from round section by distortion be arranged so that the input coupling of the raising of the emission of carrying out diode laser.

Consider first other aspect of the present invention; Wherein propose: make a kind of in particular for the light source of the laser aid of the Laser Ignition System of exciting laser device, for example internal combustion engine optically; Wherein this light source comprises diode laser and the light guide with a plurality of emitters; Wherein light guide comprises that a plurality of optical fiber and each optical fiber all have first end and side; Wherein first end is arranged such that with respect to emitter the light that is generated by emitter is transfused in first end that is coupled to optical fiber; Wherein optical fiber arranges to the border district that along its side its mode is that a plurality of optical fiber are disposed in the fiber fragment at least at least in the zone of its first end.Stipulate in addition: in fiber fragment, cause between the optical fiber of being arranged, forming direct or indirect, especially bonding firm connection, and optical fiber is then cut apart in fiber fragment.

Therefore after cutting apart optical fiber, there are at least two light guides.

Advantageously, when the optical fiber heating and/or when causing optical fiber softening and/or when causing the distortion of optical fiber, between the optical fiber that can quicken to be arranged directly or indirectly, the generation of especially bonding firm connection.

Especially stipulate: optical fiber is arranged the border district along its side in fiber fragment at least.

Advantageously; When optical fiber is arranged on the optic fibre carrier in fiber fragment; Especially when optical fiber is applied power; Can quicken manufacture process, especially between the optical fiber of being arranged, make direct or indirect bonding firm connection, wherein said power be orientated with optic fibre carrier on the abutment face of optical fiber vertical or almost vertical.

Especially stipulate: when cutting apart the optical fiber of distortion, optic fibre carrier is cut apart equally.

Advantageously, cause between the optical fiber of being arranged and optic fibre carrier, forming bonding firm being connected, cut apart equally during optical fiber that the optic fibre carrier that wherein is connected with optical fiber is arranged cutting apart.

If avoid the direct strong bond between the optical fiber, then do not expect or only with the optical crosstalk between each optical fiber of little degree expection.

Stipulate in one embodiment: optical fiber is disposed in when masterpiece is used for optical fiber between optic fibre carrier and the opposite face, and wherein optical fiber is squeezed between opposite face and optic fibre carrier.At this, on the one hand possible is, opposite face is processed by at least a heat proof material, for example SiC, and this material does not also form with optical fiber under 800 ℃ temperature and is connected.Possible on the other hand is, opposite face is the part of optic fibre carrier, and wherein second optic fibre carrier is connected with optical fiber, especially bondingly connects securely, is cut apart equally during optical fiber that second optic fibre carrier that wherein is connected with optical fiber is arranged cutting apart.In one of this method special embodiment, stipulate: optical fiber is disposed in the space that after fibre strain, is full of fully or almost completely on the width on the optic fibre carrier between optic fibre carrier and the opposite face at optical fiber, for example up to more than 95% or up to 90% to 99%.

Advantageously, being segmented within the fiber fragment of optical fiber carried out, and makes to become approximate right angle, the especially angle between 89 to 91 between interface and the major axis of optical fiber.In this way, the circuit that cut apart be minimized and the economy of this method optimised.

Advantageously, optical fiber is arranged such that optical fiber is connected to each other inside and the divided fiber fragment of optical fiber is in the central area of optical fiber, makes optical fiber when cutting apart, be divided into two identical optical fiber spares of substantial distance.

Cutting apart of optical fiber can be by means of infrared laser, especially by means of CO ₂Laser instrument carries out.

Advantageously, can first with at least one second cutting in carry out cutting apart of optical fiber, wherein first cutting major axis that is approximately perpendicular to optical fiber carries out, and second cutting is carried out along the major axis of optical fiber.In this way, at least 4 light guides of every workflow manufacturing are further optimized the economy of this method thus.

With possible the also having of the mode of economy, light guide, especially after first cutting and before second cutting especially together experience polish and/or coating.

Consider second other aspect of the present invention; Wherein propose: make a kind of in particular for the light source of the laser aid of the Laser Ignition System of exciting laser device, for example internal combustion engine optically; Wherein this light source comprises diode laser and the light guide with a plurality of emitters; Wherein light guide comprises that a plurality of optical fiber and each optical fiber all have first end and side; Wherein first end is arranged such that with respect to emitter the light that is generated by emitter is transfused in first end that is coupled to optical fiber, and wherein optical fiber arranges to the border district that along its side wherein this manufacturing approach has the following step at least in the zone of its first end:

-arrange a plurality of optical fiber, said optical fiber forms fiber fragment in the subregion, and this fiber fragment is arranged between two compressive planes respect to one another,

-make this fiber fragment heating;

-power is applied on the optical fiber of heating through compressive plane; Wherein because power and heating at first cause the distortion of the optical fiber of heating, wherein the temperature of applied force and/or optical fiber is selected as and makes to be out of shape and stationary state when optical fiber is full of regional between the compressive plane first at least basically, occurs.

The present invention based on understanding be; Optical fiber that edge-to-edge between two compressive planes arranges between compressive plane at first for the zone of volume freely in and possible be; Find out such method parameter; Make that the shaping of optical fiber in volume at first freely is possible, but when optical fiber is full of regional between the compressive plane first at least basically, do not carry out another shaping.

This method parameter for example can comprise among the following parameter or own: the minimum temperature of optical fiber when shaping; The maximum temperature of optical fiber when shaping; Minimum force when shaping between the compressive plane; Maximum, force when shaping between the compressive plane.Especially advantageously; Optical fiber is set to be heated at least minimum temperature and to be arranged on the compressive plane with minimum force extruding optical fiber; And minimum force and minimum temperature are selected as and make that the shaping of optical fiber is possible, wherein when optical fiber is full of regional between the compressive plane first at least basically, the further shaping of light are caused stationary state; Optical fiber is set to be heated up to maximum temperature; And be arranged on the compressive plane with up to maximum, force extruding optical fiber, and maximum, force and maximum temperature are selected as and make that eliminating is to the further shaping of light when optical fiber is full of regional between the compressive plane at least basically.

Advantageously, especially can carry out this mode to such an extent that feasible distortion causes stationary state, and the change of power that does not for this reason need to be acted on or temperature and/or distortion do not cause state, and that the temperature of applied force and/or optical fiber keep basically be constant.

Especially stipulate: when more than 95% of the zone between the compressive plane, when especially being filled more than 99.5%, the optical fiber of heating causes stationary state.

Advantageously, at least one compressive plane is the part of optic fibre carrier, and causes forming connection, especially forms bonding firm being connected between optical fiber and the optic fibre carrier.

Alternative or additionally, advantageously, compressive plane is the part of optic fibre carrier, and another relative compressive plane is the part of second optic fibre carrier, and cause forming connection, especially form bonding firm being connected between optical fiber and the optic fibre carrier.

On the other hand preferably, avoid between optic fibre carrier and second optic fibre carrier directly, especially bonding firm being connected.

For the degree of accuracy of improving the optical fiber shaping advantageously, optical fiber is processed by one or more first glass, and optic fibre carrier processed by one or more second glass, and the softening temperature of second glass has the value higher than the softening temperature of first glass.If correspondingly select glass, then guarantee: under the effect of power, carry out the shaping of optical fiber, rather than the shaping of optic fibre carrier.Preferably, the softening temperature of first and second glass differs by more than 20K each other.

In addition preferably, optical fiber is processed by one or more first glass, and optic fibre carrier processed by one or more second glass, and second glass hardness at room temperature has than the higher value of first glass hardness at room temperature.

In alternative embodiment, compressive plane one or both of is processed by at least a heat-resisting material, for example SiC, and this material does not form with optical fiber under 700 ℃ temperature yet and is connected.

Regulation in one embodiment, the heating of the optical fiber of arranging is carried out in fiber fragment, and its mode is that optical fiber is through at least one, especially especially be heated by means of at least one resistance heater through two compressive planes.Alternative or additionally, use the inductance heater, make and shorten fever time.

Additionally or alternately; Consider second other aspect of the present invention; Wherein propose: make a kind of in particular for the light source of the laser aid of the Laser Ignition System of exciting laser device, for example internal combustion engine optically; Wherein this light source comprises diode laser and the light guide with a plurality of emitters; Wherein light guide comprises that a plurality of optical fiber and each optical fiber all have first end and side; Wherein first end is arranged such that with respect to emitter the light that is generated by emitter is transfused in first end that is coupled to optical fiber, and wherein optical fiber arranges to the border district that along its side wherein this manufacturing approach has the following step at least in the zone of its first end:

This fiber fragment of-heating;

-through compressive plane power is applied to and makes this fiber fragment distortion on the optical fiber of heating; Wherein during applying power, confirm the height in left slit between compressive plane; And wherein when the height in remaining slit meets or exceeds in advance specified value between compressive plane, finish to apply power when determined.

Advantageously, the value of given in advance height is selected as and makes that optical fiber fills the zone between the face compressive plane at least basically when finishing to apply power.

Especially stipulate: opposite face is moved defined path length each other in order to make fibre strain.

Especially stipulate at this: this method regulation arrangement or measure the distance between the compressive plane in the time will adding pressure surface and be placed on the optical fiber; And regulation arrangement or the free cross-section measured between the compressive plane be in the part in the fiber area when being placed into compressive plane on the optical fiber, and path length comes given by the product of two parameters of arranging or measuring.

Stipulate in one embodiment: move compressive plane each other based on Piezoelectric Driving through driving highly accurately, especially passing through.

Advantageously; Remain in the slit between the compressive plane height confirm to comprise the reference measure device; This reference otherwise through for example by suitable sensing mechanism come the detection fiber distortion begin carry out, or through compressive plane regularly, for example closer to each otherly when layer begins make it contact with each other to carry out.

Advantageously; After the beginning of detection fiber distortion; Compressive plane is moved defined path length each other, and wherein path length comes given by the distance when the beginning of fibre strain and the part of compressive plane free cross-section when fibre strain begins in fiber area between the compressive plane.Possible is, these two factors are measured by known sensing mechanism itself when the distortion of optical fiber begins, but optical fiber advantageously is arranged stratification and has the round section that has known diameter.So this distance is at least roughly come given by the diameter of optical fiber and factor (1-pi/4) long-pending.

Advantageously, one of two compressive planes or two parts that compressive plane is one or two optic fibre carrier, said optic fibre carrier forms especially bonding firm being connected with optical fiber.In these cases advantageously, as above-mentioned, selecting optical fiber for the degree of accuracy of improving the optical fiber shaping aspect the material of optical fiber.

-arrange a plurality of optical fiber; Said optical fiber forms fiber fragment in the subregion; This fiber fragment is arranged between two compressive planes respect to one another of compression tool, wherein compression tool comprise two parts and wherein each in two parts of compression tool all comprise one of said compressive plane

This fiber fragment of-heating,

-make the fibre strain of heating through the relative motion between the said part of compression tool,

Relative motion between the said part of-compression tool causes stationary state, wherein collides each other indirectly or directly through two parts of compression tool to make relative motion cause stationary state.

Especially stipulate at this: optical fiber is arranged the border district along its side in fiber fragment at least.

Advantageously, the collision each other of two parts of compression tool is directly carried out, and that is to say, the part of compression tool contacts with each other.Directly can the dimensional stability of instrument be mapped to the defined shaping of optical fiber in this case with pinpoint accuracy.

Advantageously, the collision each other of two of compression tool parts is carried out through the distance piece that at least one is arranged between the compressive plane of compression tool indirectly.Such distance piece can be made and arrange, make the optical fiber that can utilize instrument accurately to come to dissimilar optical fiber, for example to have different cross section and have different materials to process carry out shaping so that relatively little one-tenth is original.

Advantageously; The part of compression tool be formed and be arranged as or distance piece be determined size and be arranged so that when optical fiber be full of at least basically first zone between the compressive plane, especially when more than 95% of compressive plane, perhaps even when being filled more than 99.5%, the relative motion between the part of compression tool causes stationary state.

Advantageously; Optical fiber stratification ground arranges and optical fiber has the round section that has known diameter; And the part of compression tool is formed and is arranged as or distance piece is determined size and is arranged so that when the distance that adds between the pressure surface of compression tool and at least roughly gives timing by the diameter of optical fiber and the long-pending of factor pi/4, and the relative motion between the part of compression tool causes stationary state.

Advantageously, the collision each other of compression tool is carried out on the next door, zone that is furnished with optical fiber inside.In this way, can realize the close as far as possible layout of optical fiber.

If arrangement interval workpiece between compressive plane; Then advantageously for the degree of accuracy of improving the optical fiber shaping; Optical fiber is processed by one or more first glass; And workpiece is processed by one or more the 3rd glass at interval, and the softening temperature of second glass has the value higher than the softening temperature of the 3rd glass.If correspondingly select glass, then guarantee: cause the distortion of optical fiber, rather than the distortion of workpiece at interval.Preferably, softening temperature differs by more than 20K each other.

Description of drawings

Fig. 1 shows the synoptic diagram of the internal combustion engine with laser-ignition unit.

Fig. 2 has at length schematically shown laser-ignition unit.

Fig. 3 a, 3b, 3c and 3d have schematically shown the example of light source.

Fig. 4,4a have schematically shown the structure and the layout of optical fiber.

Fig. 4 b has schematically shown the example of the layout of light guide and diode laser.

Fig. 5 a, 5b and 5c have schematically shown another example of light source.

Fig. 6,7a, 7b, 7c, 7e, 7f, 7g, 7h and 7i are exemplary and schematically show the manufacturing of light source.

Fig. 8 a, 8b, 8c, 8d and 8e and Fig. 9 a and 9b schematically show another example of the manufacturing of light source.

Figure 10,11,12,13 and 14 shows the other example of the manufacturing of light source.

Figure 15,15a and 15b and 16 schematically show the other example of light source.

Show to Figure 17 a, 17b and 18 schematic example property the manufacturing approach of light source.

Show to Figure 19 and 20 schematic example property another manufacturing approach of light source.

Embodiment

In Fig. 1, Reference numeral 109 is represented internal combustion engine generally.This internal combustion engine is used to drive unshowned motor vehicles or same unshowned generator.Internal combustion engine 109 comprises a plurality of cylinders 129, among Fig. 1 one of them has been shown.The firing chamber 14 of cylinder 129 receives the restriction of piston 16.Directly through in the thrower 18 arrival firing chambers 14, this thrower 18 is connected to fuel pressure storage tank 209 to fuel 229.

The fuel 229 that is injected in the firing chamber 14 is lighted by means of laser pulse 24, and said laser pulse 24 is radiated in the firing chamber 14 by the laser aid that comprises ignition device 27 11, and is focused by means of focusing optics 261.Laser aid 11 is presented pump light by light source 10 through light guide 12.Light source 10 is controlled by control and regulating device 32, and this control and regulating device 32 are also controlled thrower 18.

Light source 10 also comprises diode laser 13 except light guide 12, this diode laser 13 is exported to laser aid 11 with corresponding pump light through light guide 12 according to Control current.

Fig. 2 schematically shows the detailed view of the solid state laser 260 of the laser aid 11 among Fig. 1.As as can be seen from Figure 2; Solid state laser 260 has the active solid of laser that is called as laser crystal 44 in the back, after this solid, also is furnished with the crystal that also is called as Q-switch optically, is passive quality switch (G ü teschalter) 46.Solid state laser 260 also has input coupling mirror 42 and output coupling mirror 48.In this example, the assembly of solid state laser 260 is constructed to monolithic, that is to say, these assemblies are for example through engaging and/or coating is connected to each other with the mode that can not unclamp basically.

In order to generate the laser pulse of also claiming giant-pulse, laser crystal 44 is run through input coupling mirror 42 and is applied pump light 28a, makes to cause optical pumping and cause in laser crystal 44, forming population inversion (Besetzungsinversion).Passive quality switch 46 at first is in its stationary state, and this quality switch is to having relatively little transmission by the light that laser aid 11 generates in this stationary state.In this way, the generation of the process of stimulated emission and laser emission thus at first is suppressed.But along with the pumping duration increases, promptly during applying pump light 28a, the radiation intensity in the solid state laser 260 raises, and makes passive quality switch 46 fade at last.At this, the transmission great-jump-forward ground of this quality switch raises, and the generation of laser emission begins.This state is represented by double-head arrow 24 ' symbolism.At the laser run duration; Because the effect of stimulated emission; Be present in the rapid decline of the population inversion in the laser crystal 44, make the emission of solid state laser 260 after several nanoseconds, just stop usually, and the transmission of quality switch 46 also drops to its original little value again subsequently.

Through aforementioned manner, produce the laser pulse 24 of also claiming giant-pulse, this laser pulse has high relatively peak power.This laser pulse 24 is coupled in the firing chamber 14 (Fig. 1) of internal combustion engine 109 through the same unshowned firing chamber window input of laser aid 11 under the situation of using another light guide (not shown) or directly in case of necessity, makes and lights fuel 229 or the air/fuel mixture that wherein exists.

Fig. 3 a, 3b, 3c and 3d show the synoptic diagram of an embodiment of light source 10.Light source 10 included diode lasers 13 have the structural form of so-called diode laser bar.Therefore this diode laser bar has a plurality of emitters that are arranged side by side 131.Emitter 131 has side 1310, and the light that is generated by emitter 131 passes this side and sends.This side 1310 has the structure of essentially rectangular usually, and this structure has first long side 1311 of the for example 1 μ m of the weak point that is commonly referred to fast axle (Fast-Axis) and the long second long side 1312 of for example 10-500 μ m that is commonly referred to slow axis (Slow-Axis).In layer plane, between the emitter that is arranged side by side on the direction of slow axis 131, there is the zone that is called isolation channel, from these zones, do not launch light.By emitter 131 generate and from the side 1310 light that send have the shape of light cone respectively; Wherein the half-open bicker of light cone in fast axial plane is in 30 to 60 the scope usually, and general obviously in the slow axis plane, is generally the only angular aperture in several years greater than light cone.

Although diode laser 13 has the structural form of so-called diode laser bar in this example; The present invention also is not limited to such structural form; But for example also comprise other diode lasers 13 of arranging, for example having the layout of the emitter 131 in a plurality of layer planes with emitter 131; Wherein these layer planes for example stagger several microns for example so-called diode laser lamination or nano-stack each other on the direction of fast axle.

Have a plurality of optical fiber 121 of also claiming optical fiber 121 by light source 10 included light guides 12 equally, wherein optical fiber 121 has first terminal 1211 and second terminal 1212 respectively.Optical fiber 121 is arranged side by side with a position in its zone of first terminal 1211.In addition, optical fiber 121 is arranged such that in its zone of first terminal 1211 end face 1216 that belongs to first end 1211 of optical fiber 121 is co-located in the plane.In addition; Optical fiber 121 arranges along its end face 1217 alignment ground in its zone of first terminal 1211, promptly is arranged such that all optical fiber 121 or nearly all optical fiber 121, for example more than the optical fiber 121 of optical fiber 121 contact direct neighbor in its zone of first terminal 1211 of 90%.

In this example, the end face 1216 of optical fiber 121 has the shape of substantial rectangular, and likewise the cross section of optical fiber 121 in its first end 1211 has the shape of substantial rectangular.At this, optical fiber 121 flatly contacts with each other along the zone that is constructed near flat of the side 1217 of optical fiber 121 in its zone of first terminal 1211.But the present invention is not limited in its zone of first terminal 1211, have the optical fiber 121 in the cross section of substantial rectangular certainly.This cross section also can be trapezoidal; Perhaps has crooked limit; Wherein preferably; Optical fiber 121 in its zone of first terminal 1211, flatly contacts with each other along its side 1217 and the end face 1216 of optical fiber 121 jointly is in the plane, and wherein the end face 1216 of optical fiber 121 as far as possible closely is in together, does not promptly comprise the surface of exposure.

The end face 1216 of optical fiber 121 and the cross section of optical fiber 121 have essentially identical at least area each other, and this area preferably is in 3000 μ m ²To 5000 μ m ²Scope in.Cross section in the zone of first end 1211 that is in optical fiber 121 of the end face 1216 of optical fiber 121 and optical fiber 121 preferably has rectangular shape; The length of side of this rectangle constitutes roughly 0.78 or the ratio of pi/4, and wherein optical fiber 121 preferably contacts with each other along the minor face of rectangle.Within the scope of the invention, should the cross section of optical fiber 121 be understood as the cross section vertical with the major axis of optical fiber 121 1219.

Optical fiber 121 is processed by at least a glass, and wherein each independent optical fiber 121 is preferably processed by at least two kinds of different glass.Employed glass types for example is so-called flint glass and/or calcium soda-lime glass.

Fig. 4 shows the fragment of light guide 12, especially belongs to the fragment of first terminal 1211 end face 1216 of optical fiber 121, the cross sections of said end face 1216 expression optical fiber 121 in its zone of first terminal 1211.In the cross section of optical fiber 121, or along the end face 1216 of optical fiber 121, heart is arranged in the fibre core 1213 in the optical fiber 121 and also has on side direction, promptly vertically surrounds the optical fiber cover 1214 of fibre core 1213 with the major axis 1219 of optical fiber 121 in can seeing.In the cross section of optical fiber 121, or, can see the optical fiber flush coat 1215 that on side direction, surrounds optical fiber cover 1214 in addition along the end face of optical fiber 121.In this example, the end face 1216 of optical fiber 121 and optical fiber 121 cross section in its zone of first terminal 1211 all has approximate rectangular shape.Equally; In first terminal 1211 zone of optical fiber 121, the cross section of fibre core 1213 and the cross section of forming by fibre core 1213 and optical fiber cover 1214 that forms thing and by fibre core 1213 and optical fiber overlap 1214 and the cross section that forms thing formed of optical fiber flush coat 1215 all have approximate rectangular cross section.

Regulation: the thickness of optical fiber cover 1214 is compared, especially compared with the square root of this area of section with the area of section of fibre core 1213 in first terminal 1211 zone of optical fiber 121 at least is little; Realized thus; The emission of the high share of diode laser 13 is transfused to is coupled in the fibre core 1213, and the emission of this high share can be lost fewly and is directed there.

Although in order to realize under the situation of optical fiber cover 1214 of optical fiber 121 is coupled in light input, still at least in part light being directed to second terminal 1212 of optical fiber 121 there; Additionally or alternately stipulate: fibre core 1213 is processed by first material; Optical fiber cover 1214 is processed by second material; And optical fiber flush coat 1215 is processed by the 3rd material, wherein first material to generate by diode laser 13, wavelength for example has refractive index n for the light of 808nm ₁, wherein second material has refractive index n to the light that is generated by diode laser 13 ₂, and wherein the 3rd material has refractive index n to the light that is generated by diode laser 13 ₃, and n is wherein arranged ₁>n ₂>n ₃>1 sets up.

In this example, fibre core 1213 has the length of side of approximate rectangular profile and 60 μ m and 77 μ m in the zone of first end 1211 of optical fiber 121, and optical fiber cover 1214 forms layer and the optical fiber flush coat 1215 that roughly 2 μ m are thick and forms the roughly thick layer of 0.05 μ m.First material, be that the material of fibre core 1213 is glass, the for example flint glasss with the refractive index between 1.5 to 1.6.Second material, be that the material of optical fiber cover 1214 is glass, the for example calcium soda-lime glass with the refractive index between 1.4 to 1.5.The 3rd material, be that the material of optical fiber flush coat 1215 is plastics and has the refractive index between 1.15 to 1.35.Optical fiber flush coat 1215 additionally has the function of the intensity of improving optical fiber 121.Optical fiber flush coat 1215 can be the overcoat of being processed by lacquer (acrylic ester or plastics).

First terminal 1211 and/or second terminal 1212 of optical fiber 121 can have polishing and/or as at anti-reflecting layer 15 shown in Fig. 4 a.Such polishing and/or such anti-reflecting layer 15 are implemented as and make and to have reduced from light guide 12 outgoing the time/optical loss when inciding the light guide 12.

Alternative or additionally; Can be as Fig. 4 b be schematically illustrated; Give the uniform medium of space complete filling optics between the emitter 13 of first terminal 1211 and diode laser 13 of optical fiber 17, for example optical gel; Preferably fill following gel, make optical loss when the light that will be generated by the emitter 131 of diode laser 13 input is coupled in the optical fiber 121 reduce and/or have the refractive index n that equals or be substantially equal to fibre core ₁, for example with the refractive index n of fibre core ₁Difference be not more than 15% refractive index.

Alternative or additionally, can first terminal 1211 of optical fiber 121 be arranged as and the emitter 131 of diode laser 13 spacing at a distance of 1 μ m to 10 μ m.

As can finding out among Fig. 3 a, 3b and the 3c, optical fiber 121 is connected with optic fibre carrier 20 in first terminal 1211 zone.Employed optic fibre carrier 20 has the shape of square small pieces in this example, on the width of the for example 20mm that arranges optical fiber 121, extends, have on the direction of the major axis 1219 of optical fiber 121, be orientated for 1mm to 20mm, for example to the length of 10mm.Optic fibre carrier 20 at it towards the end face 1216 of that side of diode laser 13 and optical fiber 121 termination evenly.The height of optic fibre carrier 20 be in 1 millimeter ten/several to several millimeters the scopes, and several times high of height of optical fiber 121 normally.

Optic fibre carrier 20 is processed by glass and is connected securely with optical fiber 121 is bonding in its zone of first terminal 1211.Optic fibre carrier 20 is processed by glass, and this glass and one or more glassy phases of processing optical fiber 121 are than at room temperature having lower hardness, similar thermal expansivity and/or higher softening temperature.Employed glass types for example is a float glass.

The zone that is referred to herein as first terminal 1211 zone of optical fiber 121 be interpreted as with optical fiber 121 like lower area: optical fiber 121 is disposed on the optic fibre carrier 20 in this zone.

The complex that is made up of optical fiber 121 and optic fibre carrier 20 for example is fixed with respect to diode laser 13 through bonding.Another possibility is, produces fixingly through clamping, makes this be fixed on after a while moment for example because dismounting or readjust and can be released.

Another embodiment has been shown among Fig. 5 a, 5b and the 5c.The difference of the embodiment shown in this another embodiment and Fig. 3 a, 3b and the 3c is that optical fiber 121 not only is disposed on the optic fibre carrier 20, and is disposed between the optic fibre carrier 20 and second optic fibre carrier 21 in its zone of first terminal 1211.Optic fibre carrier 20 has the shape of square glass sheet and for example big or small identical respectively with second optic fibre carrier 21.For example, the optic fibre carrier 20 and second optic fibre carrier 21 have in the example in front to the illustrated size of optic fibre carrier 20.

Between

optic fibre carrier

20,21 and optical fiber 121, have bonding firm connection, and optic fibre carrier 20 and optic fibre carrier 21 all evenly with end face 1216 terminations of optical fiber 121.

On the one hand possible is, the face towards optical fiber 121 towards the face of optical fiber 121 and second optic fibre carrier 21 of optic fibre carrier 20 is parallel, makes leftly to have consistent height in optic fibre carrier 20, slit between 21.Alternately; Inclining towards each other of optic fibre carrier 20 towards the face of optical fiber 121 and the face towards optical fiber 121 of second optic fibre carrier 20, make left in optic fibre carrier 20, slit between 21 in the zone of the end face 1216 of optical fiber 121 than in end face 1216 region facing

optic fibre carrier

20,21 and optical fiber 121, having littler height.This inclination preferably carries out 0.1 to 2.5,0.2 to 0.5 angle for example.

According to optic fibre carrier 20, the shape in slit between 21, coming to a point continuously of optical fiber 121 is set.Through being used for importing the cross sectional shape that is coupled to optical fiber 121 and being used for the continuous transition between the cross sectional shape of photoconduction of optical fiber 121, avoided the transition of sudden change, wherein the transition of sudden change shows potential mechanical weak location.

Two

optic fibre carriers

20,21 can have similar, especially identical characteristic aspect its material.Preferably, second optic fibre carrier 21 is processed by glass, and this glass and one or more glassy phases of processing optical fiber 121 are than at room temperature having lower hardness and/or similar thermal expansivity and/or higher softening temperature.

Exemplarily set forth the manufacturing of light source 10 below according to Fig. 6.Starting point is the optic fibre carrier 20 with 1mm height, 5mm length and 14mm width.Be furnished with along the overall width of optic fibre carrier 20 and have circular end surface 1216 with round section and have roughly 1000mm length and the roughly optical fiber 121 of 70 μ m diameters; Wherein optical fiber 121 in the zone of optic fibre carrier 20 with one deck and along its end face 1217 termination evenly; That is to say all optical fiber 121 or nearly all optical fiber 121, for example more than 90% optical fiber 121 optical fiber 121 in its zone of first terminal 1211 along its end face 1217 contact direct neighbors.Therefore cause the roughly layout of 200 optical fiber 121.

Optical fiber 121 relative to each other and with respect to optic fibre carrier 20 for example under the situation of utilizing common abutment face (not shown), be oriented make optical fiber 121 end face 1216 evenly each other termination and evenly with optic fibre carrier 20 terminations.

The heating that is arranged in the optical fiber 121 on the optic fibre carrier 20 is by means of heating arrangement 70, for example carry out to for example 550 ℃ to 800 ℃ temperature by means of resistance heated, and the heat that is wherein generated by heating arrangement 70 for example runs through optic fibre carrier 20 and arrives optical fiber 121.Because the heating of optical fiber 121 and optic fibre carrier 20, cause forming bonding firm being connected between optical fiber 121 and the optic fibre carrier 20.

In one of this method alternative embodiment; As shown in Fig. 7 a and the 7b, optic fibre carrier 20 is supported through following mode with the formation that is connected between the optical fiber 121 and quickened: that side at the optic fibre carrier dorsad 20 of optical fiber 121 contacts the opposite face 22 of instrument 200 with optical fiber 121 under the effect of power F.Therefore, also generation power between optic fibre carrier 20 and optical fiber 121.For fear of also being connected forming between optical fiber 121 and the opposite face 22, this opposite face is by at least a heat proof material, for example processed by SiC, and this heat proof material is not connected with glass under the effect of heat and pressure yet.

Alternately, especially when that kind of opposite face shown in Fig. 7 c and 7b is the part of second optic fibre carrier 21, opposite face 22 also possibly be desired with the formation that is connected between the optical fiber 121.In this case; Can be by means of second heating arrangement 71, for example improve heat transfer by means of second resistance heating body, wherein this second resistance heating body is arranged on that side of first resistance heating body dorsad of the complex that is made up of optical fiber 121 and

optic fibre carrier

20,21.

In one of this method alternative embodiment, the continuation heating of optical fiber 121 and optical fiber 121 softening interrelates and/or in the distortion that causes optical fiber 121 under the effect of the power of introducing through opposite face 22 in its zone of first terminal 1211.At this; Shown in Fig. 7 e; Can observe, optical fiber 121 at first become flatly in the zone of optic fibre carrier 20 or opposite face 22 for circular cross section contacts with each other or contacts at optical fiber 121, that is to say; The curvature of the side 1217 of optical fiber 121 reduces (radius-of-curvature increase) in this zone, and the side 1217 of optical fiber 121 still increase (radius-of-curvature reduces) for the curvature in the zone freely.If the effect of heat and power further continues, then optical fiber 121 continues distortion always in its zone of first terminal 1211, and the space between optic fibre carrier 20 and opposite face 22 fully is full of (Fig. 7 e) at least basically by optical fiber 121.So; Optical fiber 121 for example has the cross section of rectangle in the zone of its first end; This square-section especially has Pi than 4 side ratio, on the other hand, also can cause cross section, for example trapezoid cross section or the curved cross section (Fig. 7 f) that are not shaped so regularly of optical fiber 121.

Stipulate in another embodiment: as from can finding out Fig. 7 g, 7h and the 7i; Than in the 121b of second portion zone, being squeezed more consumingly, wherein second portion zone 121b is arranged to the end face 1216 of optical fiber 121 spaced apart optical fiber 121 in the zone 121a of first of the end face that comprises optical fiber 121 1216.For example, the crushing strength of optical fiber 121 in the zone 121a of first is to make it after extruding, have approximate rectangular end face 1216 (Fig. 7 h).In this example, the extruding that optical fiber 121 receives in the 121b of second portion zone is so little, makes it keeps sub-circular in the 121b of second portion zone cross section (Fig. 7 i).

In this regulation: opposite face 22 becomes 0.1 to 2.5 angle with the surface of contact of optical fiber 121 on optic fibre carrier 20.Alternative or regulation additionally: the power that acts on optical fiber through opposite face 22 becomes 0.1 to 2.5 angle with the normal of the surface of contact of optical fiber 121 on optic fibre carrier 20, feasible causes the uneven extruding to optical fiber 121.

The manufacturing of single source 10, the manufacturing of especially single light guide 12 have been described before.To exemplarily describe below, and additionally or alternately can in a workflow, make a plurality of light source 10 respectively, make a plurality of light guides 12 especially respectively.

At this for example shown in Fig. 8 a and 8b; A plurality of optical fiber 121, especially very large purpose optical fiber 121, for example 1000 or more optical fiber 121 are arranged side by side; Make optical fiber 121 in fiber fragment 1218, be in the edge-to-edge along its side 1217; That is to say layout like this, make all optical fiber 121 or nearly all optical fiber 121, for example in its zone of first terminal 1211, in fiber fragment 1218, contact the optical fiber 121 of direct neighbor more than 90% optical fiber 121 along its side 1217.

Optical fiber 121 is arranged such that fiber fragment 1218 at least roughly is in the middle part of optical fiber 121 on the length direction of optical fiber 121.Optical fiber 121 is in fiber fragment 128 on the optic fibre carrier 20 in addition, and this optic fibre carrier 20 for example is glass plate and has roughly 1 millimeter height, several millimeters length and 50mm to 200mm or above width.In this example, second optic fibre carrier 21 and first optic fibre carrier 20 relatively are placed on the optical fiber 121, and the characteristic of second optic fibre carrier 20 is consistent with optic fibre carrier 20 aspect geometry and material.

Method step in Fig. 8 c below schematically illustrated.These method steps comprise: utilize two

heating arrangements

70,71 that are configured to resistance heating body to make optic fibre carrier 20 and optic fibre carrier 21 heating.Therefore, optical fiber 121 is heating indirectly also, in this example, become warm to 550 to 850 ℃.In addition, these method steps comprise: power F is acted on optic fibre carrier 20 and power F ' is acted on second optic fibre carrier 21.Power F and F ' are opposite each other and be oriented feasible through two optic fibre carriers, 20,21 total total for example 0.5 N/cm ²To 50 N/cm ²Pressure be applied on the optical fiber 121.

Because the effect of this pressure; Cause the distortion in the zone of optical fiber 121 between the optic fibre carrier 20 and second optic fibre carrier 21, wherein at first have circular cross section and cross section that should circle in the zone of optical fiber 121 between the optic fibre carrier 20 and second optic fibre carrier 21 because the distortion of optical fiber 121 and such as stated distortion.

Also show correspondingly an example of the optical fiber 121 of distortion among Fig. 8 b, wherein the cross section of optical fiber 121 has flattening portion in optical fiber 121 contact

optic fibre carriers

20,21 or the zone that contacts with each other.Another example has been shown among Fig. 8 e, and wherein optical fiber 121 has been full of the zone between optic fibre carrier 20 and the optic fibre carrier 21 basically, makes whole optical fiber 121 be full of the space between optic fibre carrier basically fully.The cross section of each optical fiber 121 in optic fibre carrier 20, zone between 21 can be rectangle or trapezoidal.

Carry out the cooling of optical fiber 121 and

optic fibre carrier

20,21 below, wherein cause the curing of optical fiber 121 and wherein form bonding firm being connected with optic fibre carrier 20, between 21 at optical fiber 121.

As Fig. 9 a exemplarily illustrates, in this example, stipulate: the complex by optic fibre carrier 20, optical fiber 121 and second optic fibre carrier 21 constitute is followed the cutting of in the zone of the fiber fragment 1218 of optical fiber 121, carrying out by means of the major axis that is approximately perpendicular to optical fiber 121 1,219 55 and is divided into two parts 301,302 about equally.Cutting 55 for example can known manner by means of diamond saw or by means of scraping quarter or fractureing or by means of laser beam, for example infrared laser, especially CO ₂Laser is carried out.

Alternatively, the part 301,302 of two parts that obtain like this 300,301 or a plurality of such acquisitions can be piled up each other and polished and/or be equipped with anti-reflecting layer together.

The part that obtains 301,302 be appreciated that together two light guides 12 making.

In addition; Alternatively also can be as Fig. 9 b schematically shows; Come individually or together part 301,302 is further split through carrying out in the zone of the fiber fragment 1218 of optical fiber 121 one or many second cutting of carrying out along the major axis 1219 of optical fiber 121 56, and so generate a plurality of light guides 12.Second cutting 56 can be carried out neatly, carries out especially like this, and the width of the light guide 12 that is promptly generated is corresponding to the coefficient width that is used for of diode laser 13.

Second cutting 56 can be carried out as cutting 55 equally, for example by means of diamond saw or by means of scraping quarter or fractureing perhaps by means of laser beam, for example infrared laser, especially CO ₂Laser is carried out.

Especially can part 301,302 or a plurality of parts 301,302 be piled up in order to carry out second cutting 56, make to be partitioned into a plurality of light guides 12 at 56 o'clock in each second cutting.

As stated; The manufacturing of light source 10 can be stipulated: in first terminal 1211 the zone of power F at optical fiber 121 or in the fiber fragment 1218 of the for example approximate mid-section of optical fiber 121, act on the distortion that causes the optical fiber 121 of heating under the situation of optical fiber 121 of heating, for example be deformed into and make the optical fiber 121 of whole distortion be full of the zone between the optic fibre carrier 20 and second optic fibre carrier 21 fully.Certainly also possible is, the optic fibre carrier 20 and/or second optic fibre carrier 21 are replaced by second instrument of for example being processed by SiC, and this instrument is not connected with optical fiber 121 and is removed later in optical fiber 121 distortion.Importantly, optical fiber 121 that kind shown in figure 10 are arranged in two compressive planes 201, between 202, and wherein power F and reacting force F ' act on optical fiber 121 through said compressive plane.In this case, one mounting arrangement between mounting does not have two

optic fibre carriers

21,22, but the highlyest has an optic fibre carrier 21.Particularly preferably be in this case, introduce first and/or second cutting 55,56 through scraping quarter and rupturing.

In the example below, power F and F ' although be selected as makes the distortion cause optical fiber 121, and when optical fiber 121 is full of compressive plane 201, regional between 202 first at least basically (for example>cross section 99.5%), stationary state appears in this distortion.At this, avoided deficiency so that the too small power F of optical fiber 121 distortion and the excessive power that will cause optical fiber 121 from compressive plane 201, zone between 202, to drop out from side direction.

Particularly, the optical fiber by flint glass/the calcium soda-lime glass constitutes that 140 sizes are 15mm*8mm is disposed in two compressive planes 201, between 202, and be heated to roughly 630 ℃, be more than the softening temperature of optical fiber 121.Then, optical fiber 121 is applied in power F.For this power, desired showing between the 1N to 35N is observed.

Certainly, possiblely in certain limit be, optical fiber 121 is heated to higher or lower temperature, cause the raising of optical fiber 121 or the flowability that reduces thus.In this case; The zone of the following performance of the appearance of power F can be passed and can be found through trial: although said performance causes the distortion of optical fiber 121; But when optical fiber 121 is full of compressive plane 201, regional between 202 first at least basically (for example>cross section 99.5%), stationary state appears in this distortion.In this example, this power is desired shows between the 10N to 20N and fiber optic temperature reaches between 690 ℃ at 590 ℃.

In another embodiment; Regulation additionally or alternately: confirm left at compressive plane 201, the height in slit between 202; Wherein when determined value meets or exceeds in advance specified value; That is to say, when the height in left slit meets or exceeds given in advance height when compressive plane 201, between 202, finish to apply power F.

On the one hand (for example>cross section 99.5%) can be finished applying of power when optical fiber 121 has been full of compressive plane 201, regional between 202 basically, also can select another highly on the other hand.In embodiment shown in Figure 11, have at first for circular cross section and in example 100 be 100 μ m diameter D optical fiber 121 by individual layer ground and along side 1217 edge-to-edges of optical fiber 121 put into two compressive planes 201, between 202.Compressive plane 201,202 is respectively the part that is connected with optical fiber 121 of

optic fibre carrier

20,21 or is that for example processed by SiC and parts optical fiber 121 unconnected instruments 200.

Compressive plane 201,202 can be through actuator 60, for example passed through piezo actuator at this, wherein the passing of compressive plane 201,202 be applied in signal on the actuator 60, for example by voltage triggered.Defined be: for example based on being applied to the signal on the actuator or detecting the actual pitch to each other of compressive plane 201,202 through optical system.

In this example, before being applied to voltage on the piezo actuator through following mode with reference to compressive plane 201,202 position relative to each other: compressive plane 201,202 is contacted with also softening optical fiber 121.Then, improving progressively or continuously and be applied to the voltage on the piezo actuator, is the extended length of 22 μ m up to the voltage that is applied corresponding to piezo actuator.At this constantly, be full of the optical fiber 121 of distortion at least basically fully in compressive plane 201, space between 202.

In alternative embodiment, stipulate: leftly come given through following mode at compressive plane 201, the height in slit between 202: extruding is carried out by means of compression tool 200; This compression tool is made up of two parts 211,212, and wherein first compressive plane 201 is assigned to the first 211 of compression tool 200 and the second portion 212 that second compressive plane 202 is assigned to compression tool 200.Shown in figure 12, the first of compression tool 200 has projection 2111 at this in its perimeter.Projection 2111 is formed and is arranged so that it has abutment face 2112, and this abutment face flushes with second compressive plane 202.For the distortion of the optical fiber 121 that defines heating and stipulate: two parts 211,212 of compression tool 200 are closer to each other, contact with second compressive plane 202 up to the abutment face 2112 of the projection 2111 of the first 211 of compression tool 200.Therefore, left in compressive plane 201, slit between 202 through defining by projection 2111 given tolerance embodiment portions (Ma verk rperung).

Certainly, the second portion 212 of compression tool 200 can alternately perhaps shown in figure 13ly additionally have projection 2111 in its perimeter.Especially, two parts 211,212 of compression tool 200 can for example have projection 2111 in its perimeter, and wherein projection 2111 has parallel abutment face 2112.In this case, for the defined distortion regulation of the optical fiber 121 of heating: two parts 201,202 of compression tool are closer to each other, contact with each other up to the abutment face 2112 of the projection 2111 of the first 211 of compression tool 200 and second portion 212.Left in compressive plane 201, slit between 202 thus through defining by projection 2111 given tolerance embodiment portions.

The part that is called first 211 and the second portion 212 of compression tool 200 below can be two instruments, the instrument of for example being processed by SiC on the strict letter on the one hand, and this instrument is under the effect of heat and pressure, for example 800 ℃ temperature with up to 50N/cm ²Pressure under be not connected with optical fiber 121 yet.Possible on the other hand is; As passing through to use shown in the

Reference numeral

20 and 21 in Figure 12 and 13; The first 211 of compression tool 200 is that the second portion 212 of optic fibre carrier 20 and/or compression tool 200 is second optic fibre carriers 21, and the optic fibre carrier 20 and/or second optic fibre carrier 21 wherein preferably processed by glass form bonding firm being connected under the effect of heat and pressure.

Regulation in another example: leftly come given through following mode at compressive plane 201, the height in slit between 202: extruding is carried out by means of compression tool 200; Make to constitute by two parts 211,212, wherein first compressive plane 201 first 211 and second compressive plane 202 that are assigned to instrument 200 be assigned to the second portion 212 of instrument 200 and wherein at compressive plane 201, between 202, for example in the perimeter of compression tool 200, arrange a distance piece 40 or a plurality of distance piece 40.

In the embodiment of this example shown in Figure 14, the difference arrangement interval part 40 in the both sides of optical fiber 121.Distance piece 40 have and should be left at compressive plane 201, the corresponding height of height in slit between 202.Distance piece 40 or by under the heat and the effect of pressure, for example 800 ℃ temperature with up to 50N/cm ²Pressure under the material that also is not connected with optical fiber 121 process, or distance piece 40 is processed by glass and under the effect of heat and pressure, form bonding firm being connected with optical fiber 121.

Defined distortion regulation for the optical fiber 121 of heating: two parts 211,212 of compression tool are closer to each other, contact with two compressive planes 201,202 up to distance piece 40.Left in compressive plane 201, slit between 202 thus through defining by distance piece 40 given tolerance embodiment portions.

As in the aforementioned exemplary, the first 211 and the second portion 212 of compression tool 200 can be the instrument on the strict letter, the instrument of for example being processed by SiC, and this instrument is under the effect of heat and pressure, for example 800 ℃ temperature with up to 50N/cm ²Pressure under be not connected with optical fiber 121 yet.Possible on the other hand is; The first 211 of compression tool 200 is that the second portion 212 of optic fibre carrier 20 and/or compression tool 200 is second optic fibre carriers 21, wherein the optic fibre carrier 20 and/or second optic fibre carrier 21 preferably process by glass and under the heat and the effect of pressure with optical fiber 121 and also form bonding firm being connected alternatively with distance piece 40.Preferably avoid the distortion of distance piece 40.

Figure 19 and 20 shows another embodiment of light source 10, and this light source 10 comprises diode laser 13 and light guide 12.As in the example in front; Diode laser 13 interacts with light guide 12; Make diode laser 13 comprise a plurality of emitters that are arranged side by side 131; These emitters and a plurality of optical fiber 121 arrange that relatively wherein emission 135 inputs of the emitter 131 of diode laser 13 are coupled in the said optical fiber 121.

Because the layout of emitter 131 and optical fiber 121 and since the spatial character of the emission 135 of the emitter 131 of diode laser 13 cause: the part of the emission 135 of input coupling emitter 131 in optical fiber 121, and in other optical fiber 121, do not have or little light is transfused to coupling.Regulation: not or the optical fiber 121 that has little light to be transfused to be coupled to by means of the cutter sweep that is configured to grid cutter 65 preferably optic fibre carrier 20 near quilt cut apart.Utilize especially directly the carrying out from optic fibre carrier 20 outstanding seamed edges of cutting apart of 65 pairs of optical fiber 121 of grid cutter at optic fibre carrier 20 at optical fiber 121 places.Grid cutter 65 has the cutting element 65 that has width A, and wherein width A equals or be approximately equal to the width in the gap between the emitter 131 of diode laser 13.The spacing P of cutting element 65a is equal to each other, and perhaps is approximately equal to the spacing P that emitter 131 is had to each other.At this, should approximately equal be understood as maximum following deviation: this deviation corresponding to emitter 131 in the exit facet of emitter 131 and the spatial spread of the emission 135 between the end face 1216 of optical fiber 121 in slow axis.

Utilize carry out through following mode cutting apart preferably of 65 pairs of optical fiber 121 of grid cutter: first cutting of grid cutter 65 is positioned in before the diode laser 13, makes cutting element 65a arrive between the emitter 131 of diode laser 13.The latter can realize through following mode: the emitter 131 of diode laser 13 is launched light and the light quantity of sending through grid cutter 65 is maximized aspect the laterally offset of grid cutter 65.Then carry out lifting, light guide 12 location before diode laser 13 of grid cutter 65, and then do not shine or the cutting apart of the optical fiber 121 of irradiation on a small quantity through decline grid cutter 65.

Figure 15,15a and 15b show another embodiment that comprises the light source 10 of coefficient diode laser 13 and light guide 12 as in the example of front.Because the layout of emitter 131 and optical fiber 121 and since the spatial character of the emission 135 of the emitter 131 of diode laser 13 cause: different many emissions 135 of the emitter 131 of input coupling diode laser instrument 13 in optical fiber 121, and the therefore different many optical radiation of input coupling.In fact do not import coupled radiation in the optical fiber 121 in the gap region facing that is arranged in emitter 131.With emitter 121 more in input coupling much the same many radiation, radiation power P in the relative optical fiber 121 of heart ₁Radiation.Its radiation power of input coupling is in 0 to P in the optical fiber 121 relative with the fringe region of emitter 121 ₁Between radiation.

Input has been shown among Figure 16 is coupled to the frequency that the result of radiation power P in the optical fiber 121 obtains and distributes.Can find out, be coupled with radiation power P except roughly importing ₁First group of 84 optical fiber 121 and do not have or almost do not have radiation power to be transfused to beyond second group of 81 optical fiber 121 of coupling, also exist input to be coupled with the 3rd group of 83 optical fiber 121 of following radiation, the radiation power of this radiation is between 0 to ultimate value G.In addition, the 4th group of 82 optical fiber 121 that has the following radiation of input coupling: the radiation power of this radiation is in ultimate value G to P ₁Between.

Regulation: the first 501 that first group and the 4th group of 82,84 optical fiber 121 form optical fiber 121 (Figure 15 a), and forms bundle 85, especially under the effect of pressure and heat, is connected to each other and/or becomes close in its zone of second terminal 1212.

---wherein importing coupling ratio few light in the optical fiber 121 of the first 501 of optical fiber 121 respectively---arranges round bundle 85 in Figure 15 b, to schematically show another embodiment, wherein the optical fiber 121 of the second portion 502 of optical fiber 121.

Such light source 10 for example can be made through following mode: light guide 12 is arranged in as aforementioned before the diode laser 13.Through applying working current for diode laser 13, diode laser 13 is excited in the zone of emitter 131 with emission light.This light is mainly imported in the optical fiber 121 that is coupled to light guide 12, and the radiation input that wherein has radiation power P is coupled in each independent optical fiber 121.Regulation: for each independent optical fiber 121 detects this radiation power.

Shown in Figure 17 a, the test example of radiation power is as carrying out through following mode: second terminal 1212 of optical fiber is videoed on the ccd video camera 400.Possible on the other hand is, shown in Figure 17 b, makes optical fiber 121 experience diffraction 1210, makes more scattered radiation from its outgoing, and this scattered radiation is videoed on the ccd video camera 400.

Regulation: as Figure 18 was schematically illustrated, the image of being taken by ccd video camera 400 was transferred to control module 402.By control module 402 decision, the radiation power P that is directed to the radiation in the independent optical fiber 121 is higher than or is lower than ultimate value G.Stipulate in addition: control module 402 is with segmenting device 401, for example CO ₂Optical Maser System is controlled to be, and makes to cut apart following optical fiber 121: have the radiation power that is directed to the radiation in these optical fiber 121 to be lower than ultimate value G to said optical fiber 121 decisions.

Regulation: left optical fiber 121, i.e. quilt decision are higher than the optical fiber 121 of ultimate value G and in the zone of second end 1212 of optical fiber 121, form bundle 85 by the radiation power that is directed to radiation wherein.Alternatively, can the optical fiber 121 that in second terminal 1211 zone, makes up is close and/or be bonded to each other and be connected securely through the effect change of pressure and heat in its zone of second terminal 1212.

Regulation; The radiation of outgoing is used to pumped solid-state laser device 260 (Fig. 2) optically from the optical fiber 121 of forming bundle 85, and the emission of this solid state laser is used to generate and is used for ignition function (Fig. 1) that the burning of internal combustion engine 109 is lighted a fire.Under this background, be clear that, like this selection limit value G advantageously, the characteristic that promptly makes the burning in the internal combustion engine 109---especially power, emission value, spark plug number or the like---is optimised.On the other hand, it is optimised that ultimate value G also can be selected as and make at least one characteristic of emission of solid state laser 260---especially the density of radiation of the radiation quality of the output power of solid state laser 260, solid state laser 260 or the every space angle of every area---.

Claims

1. one kind in particular for the light source of the laser aid (11) of the Laser Ignition System of exciting laser device (11), for example internal combustion engine (109) optically; This light source comprises diode laser (13) and the light guide (12) with a plurality of emitters (131); Wherein light guide (12) comprises that a plurality of optical fiber (121) and each optical fiber (121) all have first end (1211) and side (1217); Wherein first end (1211) is arranged such that with respect to emitter (131) light that is generated by emitter (131) is transfused in first end (1211) that is coupled to optical fiber (121); Wherein the edge-to-edge arranges on ground optical fiber (121) along its side (1217) in the zone of its first end (1211) at least; It is characterized in that optical fiber (121) is connected with optic fibre carrier (20) in the zone of its first end (1211).

2. light source according to claim 1 is characterized in that, optic fibre carrier (20) is connected with the side (1217) of optical fiber (121) in the zone of first end (12111) of optical fiber (20).

3. light source according to claim 1 and 2 is characterized in that, optical fiber (121) is connected with optic fibre carrier (20) is bonding securely.

4. according to the described light source of one of aforementioned claim, it is characterized in that, optic fibre carrier (20) on the length direction of optical fiber (121) with optical fiber (121) termination evenly.

5. according to the described light source of one of aforementioned claim, it is characterized in that light guide (12) has second optic fibre carrier (21), wherein optical fiber (121) is disposed between the optic fibre carrier (20,21) in the zone of its first end (1211).

6. light source according to claim 5; It is characterized in that; Optical fiber (121) and optic fibre carrier (20,21) be bonding connect securely and/or optic fibre carrier (20,21) on the length direction of optical fiber (121) each other evenly termination and with optical fiber (121) termination evenly.

7. according to the described light source of one of aforementioned claim; It is characterized in that; Optical fiber (121) is processed by one or more first glass; And optic fibre carrier (20) or optic fibre carrier (20,21) are processed by one or more second glass, and the softening temperature of one or more second glass has higher value than the softening temperature of one or more first glass.

8. light source according to claim 7 is characterized in that, the softening temperature of one or more second glass has high by 20 to 250K, 20 to 150K the value especially of softening temperature than one or more first glass.

9. according to the described light source of one of aforementioned claim; It is characterized in that; Optical fiber (121) is processed by one or more first glass; And optic fibre carrier (20) or optic fibre carrier (20,21) are processed by one or more second glass, and one or more first glass of one or more second glass hardness ratio at room temperature hardness at room temperature has lower value.

10. according to the described light source of one of aforementioned claim; It is characterized in that; Optical fiber (121) is processed by one or more first glass; And optic fibre carrier (20) or optic fibre carrier (20,21) are processed by one or more second glass, and the thermal expansivity of the thermal expansivity of one or more first glass and one or more second glass differs the highest by 5% in the softening temperature of said glass and the temperature range between the room temperature.

11. according to the described light source of one of aforementioned claim; It is characterized in that; Optical fiber (121) contacts optic fibre carrier (20) or optic fibre carrier (20 at least in the zone that it contacts with each other and/or at it in the zone of its first end (1211); 21) has bigger radius-of-curvature in the zone than neither contact with each other at it also non-contacting fiber carrier (20) or optic fibre carrier (20,21) in the zone.

12. light source according to claim 11 is characterized in that, optical fiber (121) has approximate rectangular cross section at least in the zone of its first end (1211), and this square-section especially has Pi roughly than 4 side ratio.

13. according to the described light source of one of aforementioned claim; It is characterized in that; Optical fiber (121) has first zone (121a) in the zone of its first end (1211); This first zone (121a) is towards the end face (1216) of optical fiber (121); And optical fiber (121) has second portion zone (121b) in the zone of its first end (1211), and this second portion zone (121b) is spaced apart with end face (1216), and wherein the cross section of optical fiber (121) in first zone (121a) compared with the rounded face deviation more with the cross section of optical fiber (121) in second portion zone (121b).

14. light source according to claim 13; It is characterized in that; The end face (1216) of optical fiber (121) has the cross section of approximate trapezoid at least or approximate rectangular cross section, especially trapezoidal or rectangle, and the cross section of optical fiber (121) in the zone of first end (1211) of optical fiber (121) carries out the transition to sub-circular, the especially cross section of circle along the major axis (1219) of optical fiber (121).

15. according to the described light source of one of aforementioned claim; It is characterized in that; The cross section of optical fiber (121) is not that great-jump-forward ground changes under the situation that is not arranged in the zone on optic fibre carrier (20) or the optic fibre carrier (20,21) from fiber arrangement at the regional transition to optical fiber (212) on optic fibre carrier (20) or the optic fibre carrier (20,21); But constant basically, especially remain circle.

16. one kind is used for making according to the described light source of one of aforementioned claim (10), in particular for the method for the light source (10) of the laser aid (11) of the Laser Ignition System of exciting laser device (11), for example internal combustion engine (109) optically, it is characterized in that the following step:

-go up layout a plurality of optical fiber (121) at optic fibre carrier (20),

-make optical fiber (121) heating in the zone of its first end (1211) of being arranged,

-form heating optical fiber (121) and optic fibre carrier (20) between be connected.

17. method according to claim 16 is characterized in that, optical fiber (121) is arranged in to the edge-to-edge on the optic fibre carrier (20) along its side (1217) in the zone of its first end (1211) at least each other.

18. according to claim 16 or 17 described methods, it is characterized in that, when optical fiber (121) heating, cause the softening of optical fiber (121).

19. according to the described method of one of claim 16 to 18, it is characterized in that, during heating or afterwards, power be applied to optical fiber (121) is gone up and this power is oriented vertical with the surface of contact of optical fiber (121) on optic fibre carrier (20).

20. according to the described method of one of claim 16 to 18; It is characterized in that; During heating or afterwards; Power is applied on the optical fiber (121), and this power becomes 0.1 to 2.5 angle with the normal of the surface of contact of optical fiber (121) on optic fibre carrier (20), make to cause uneven extruding.

21., it is characterized in that according to the described method of one of claim 16 to 20, when the connection that forms between the optical fiber (121) of heating, cause the distortion of optical fiber (121), wherein cause between optical fiber (121) and optic fibre carrier (20), forming strong bond.

22. according to the described method of one of claim 16 to 21, it is characterized in that, avoid the strong bond between the optical fiber (121).

23. method according to claim 19; It is characterized in that; Masterpiece is used for optical fiber (121) during; Optical fiber (121) is arranged between optic fibre carrier (20) and the opposite face (22), and the power that wherein acts on optical fiber (121) acts on optical fiber (121) by means of opposite face (22).

24. method according to claim 23 is characterized in that, opposite face (22) is processed by heat proof material, for example SiC, and this material does not form with optical fiber (121) under the temperature of 800 C yet and is connected.

25. method according to claim 23 is characterized in that, opposite face (22) is the part of second optic fibre carrier (21), and wherein second optic fibre carrier (21) is connected with optical fiber (21) equally.

26., it is characterized in that optical fiber (121) is arranged in the space that almost completely is full of on the width on the optic fibre carrier (20) between optic fibre carrier (20) and the opposite face (22) at optical fiber (121) according to the described method of one of claim 22 to 25.